Class: Acbaker::AssetPack

Inherits:
Object
  • Object
show all
Defined in:
lib/acbaker/asset_pack.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(type, options = {}) ⇒ AssetPack

Returns a new instance of AssetPack.



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# File 'lib/acbaker/asset_pack.rb', line 7

def initialize(type, options={})
  @type = type
  if options[:json]
    @json_data = options[:json]
  else
    @json_file = File.join(File.dirname(File.expand_path(__FILE__)), "config", "#{type}.json")
    @json_data = JSON.parse(File.open(@json_file).read)
  end
  @images = @json_data['images']
  @options = self.defaults().merge(options)
end

Instance Attribute Details

#images ⇒ Object (readonly)

Returns the value of attribute images.



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# File 'lib/acbaker/asset_pack.rb', line 5

def images
  @images
end

#type ⇒ Object (readonly)

Returns the value of attribute type.



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# File 'lib/acbaker/asset_pack.rb', line 5

def type
  @type
end

Instance Method Details

#defaults ⇒ Object 



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# File 'lib/acbaker/asset_pack.rb', line 19

def defaults
  {json: false}
end

#process(source_image_file, target_directory, &block) ⇒ Object 



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# File 'lib/acbaker/asset_pack.rb', line 23

def process(source_image_file, target_directory, &block)
  
  # Define variables
  json_output_file = File.join(target_directory, "Contents.json")
  
  # Loop through images
  @json_data['images'].each_with_index do |image_spec, index|

    # Get size
    (width_str, height_str) = image_spec['size'].split('x')
    scale = image_spec['scale'].gsub('x', '').to_i
    width = width_str.to_i * scale
    height = height_str.to_i * scale
    size_max = [width, height].max
    base_width = width / scale
    base_height = height / scale

    # Get version
    if image_spec['minimum-system-version'].nil?
      version = 'ios56'
    elsif image_spec['minimum-system-version'] == '8.0'
      version = 'ios8'
    elsif image_spec['minimum-system-version'] == '7.0'
      version = 'ios78'
    else
      version = 'ios56'
    end

    # Generate filename
    filename_array = []
    filename_array.push(@type)
    filename_array.push(image_spec['idiom']) if image_spec['idiom']
    filename_array.push(image_spec['orientation']) if image_spec['orientation']
    filename_array.push(version)

    # Add subtype
    if image_spec['subtype']
      if image_spec['subtype'] == '736h'
        filename_array.push('retina-hd-55')
      elsif image_spec['subtype'] == '667h'
        filename_array.push('retina-hd-47')
      else
        filename_array.push(image_spec['subtype'])
      end
    end

    # Add extent
    filename_array.push(image_spec['extent']) if image_spec['extent']

    # Add size
    filename_array.push(image_spec['size'])

    if scale > 1
      filename = "#{filename_array.join('-')}@#{scale}x.png"
    else
      filename = "#{filename_array.join('-')}.png"
    end

    # Generate image
    cmd = "convert #{source_image_file} -resize #{width}x#{height}^ -gravity Center -crop #{width}x#{height}+0+0 +repage #{target_directory}/#{filename}"
    system(cmd)
    
    # Trigger Callback proc
    block.call("#{target_directory}/#{filename}", index+1) if not block.nil?

    # Update json data
    image_spec['filename'] = filename

  end
  
  # Save Contents.json
  File.open(json_output_file,"w") do |f|
    f.write(JSON.pretty_generate(@json_data))
  end
  
  true
end